小型自动气象站直流不间断电源设计

详细介绍了自主设计的小型自动气象站直流不间断电源充电器，该充电器是基于UC3906芯片设计，配合使用LM2576芯片构成一个降压开关型集成稳压电路，通过触发高低电平对不同状态的充电过程进行控制，既可以进行高效率高精度的充电，也可以完成备用电源的接入与切断，从而实现小型自动气象站的电源设备管理。此外，该充电器还设计了测量日照时间的功能，即通过计算太阳能电池板所输出的电平变化率计算日照时间。与常规的单片机充电器相比，该充电器提高了系统的充电效率和使用寿命，使太阳能能被充分地利用，实际应用效果良好，具有一定的推广意义。

Design of Uninterruptible DC Power Supply for Small Automatic Meteorological Stations

Details of a self designed small DC uninterruptible power charger for automatic weather stations are described. It is based on the UC3906 chip design, in conjunction with LM2576 chip to constitute an integrated buck switching regulator circuit, triggered by high and low levels to control the charging process of the different states. It has functions of not only high efficiency precision charging, but also accessing and cutting off standby power, so to enable the power supply management of small automatic weather stations. In addition, the charger is also designed to measure sunshine duration, which is calculated based on the change rate of level outputs of the solar panel. Compared with conventional single chip chargers, the charger improves the charging efficiency and lifetime of the system, so to make full use of solar energy. The practical application indicates that it performs well and has certain potential of promotion.